3337U: Ivy-Bridge-based ULV-CPU in Q1 2013. Offers a core clock of 1.8 - 2.7 GHz and an HD 4000 GPU (350 - 1100 MHz). The TDP is rated at 17 W.» Further information can be found in our Comparison of Mobile Processsors.

15.6":

15-16 inch is a standard display size for laptops and offers the biggest variety of products.